Planner is a software product that attempts to bridge the gap between planning with simple spreadsheets (no help whatsoever) and complex products such as Microsoft(r) Project. It does so by providing a simple interface to do your planning work.

Dolphinity Planner Features
Multi-client, multi-project planning, Easy and quick todo-list.
Multiple human resources (employees and/or external persons).
Simple Gantt chart displaying which tasks are currently relevant.
Quick filtering on resource (view and print tasks for a single person).
User-friendly interface; implicit creation of clients and projects.
Task start-end dates to get an overview of what tasks are relevant today and in the future
Tasklists for both planned&unplanned tasks, as well as agreements made with 3rd parties.